X-Git-Url: https://www.bearssl.org/gitweb//home/git/?p=BearSSL;a=blobdiff_plain;f=src%2Fssl%2Fssl_ccert_single_ec.c;fp=src%2Fssl%2Fssl_ccert_single_ec.c;h=1df19a9a4989252fb33740f9c7918485f7c76b53;hp=0000000000000000000000000000000000000000;hb=e61ad42191511226309bad2cbde8cd9e8cc743cb;hpb=e9ce2f4e8c7c25b9cb18d5a3cfb4cdcb5d8f765f

diff --git a/src/ssl/ssl_ccert_single_ec.c b/src/ssl/ssl_ccert_single_ec.c
new file mode 100644
index 0000000..1df19a9
--- /dev/null
+++ b/src/ssl/ssl_ccert_single_ec.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "inner.h"
+
+static void
+cc_none0(const br_ssl_client_certificate_class **pctx)
+{
+	(void)pctx;
+}
+
+static void
+cc_none1(const br_ssl_client_certificate_class **pctx, size_t len)
+{
+	(void)pctx;
+	(void)len;
+}
+
+static void
+cc_none2(const br_ssl_client_certificate_class **pctx,
+	const unsigned char *data, size_t len)
+{
+	(void)pctx;
+	(void)data;
+	(void)len;
+}
+
+static void
+cc_choose(const br_ssl_client_certificate_class **pctx,
+	const br_ssl_client_context *cc, uint32_t auth_types,
+	br_ssl_client_certificate *choices)
+{
+	br_ssl_client_certificate_ec_context *zc;
+	int x;
+	int scurve;
+
+	zc = (br_ssl_client_certificate_ec_context *)pctx;
+	scurve = br_ssl_client_get_server_curve(cc);
+
+	if ((zc->allowed_usages & BR_KEYTYPE_KEYX) != 0
+		&& scurve == zc->sk->curve)
+	{
+		int x;
+
+		x = (zc->issuer_key_type == BR_KEYTYPE_RSA) ? 16 : 17;
+		if (((auth_types >> x) & 1) != 0) {
+			choices->auth_type = BR_AUTH_ECDH;
+			choices->hash_id = -1;
+			choices->chain = zc->chain;
+			choices->chain_len = zc->chain_len;
+		}
+	}
+
+	/*
+	 * For ECDSA authentication, we must choose an appropriate
+	 * hash function.
+	 */
+	x = br_ssl_choose_hash((unsigned)(auth_types >> 8));
+	if (x == 0 || (zc->allowed_usages & BR_KEYTYPE_SIGN) == 0) {
+		memset(choices, 0, sizeof *choices);
+		return;
+	}
+	choices->auth_type = BR_AUTH_ECDSA;
+	choices->hash_id = x;
+	choices->chain = zc->chain;
+	choices->chain_len = zc->chain_len;
+}
+
+static uint32_t
+cc_do_keyx(const br_ssl_client_certificate_class **pctx,
+	unsigned char *data, size_t len)
+{
+	br_ssl_client_certificate_ec_context *zc;
+
+	zc = (br_ssl_client_certificate_ec_context *)pctx;
+	return zc->iec->mul(data, len, zc->sk->x, zc->sk->xlen, zc->sk->curve);
+}
+
+static size_t
+cc_do_sign(const br_ssl_client_certificate_class **pctx,
+	int hash_id, size_t hv_len, unsigned char *data, size_t len)
+{
+	br_ssl_client_certificate_ec_context *zc;
+	unsigned char hv[64];
+	const br_hash_class *hc;
+
+	zc = (br_ssl_client_certificate_ec_context *)pctx;
+	memcpy(hv, data, hv_len);
+	hc = br_multihash_getimpl(zc->mhash, hash_id);
+	if (hc == NULL) {
+		return 0;
+	}
+	if (len < 139) {
+		return 0;
+	}
+	return zc->iecdsa(zc->iec, hc, hv, zc->sk, data);
+}
+
+static const br_ssl_client_certificate_class ccert_vtable = {
+	sizeof(br_ssl_client_certificate_ec_context),
+	cc_none0, /* start_name_list */
+	cc_none1, /* start_name */
+	cc_none2, /* append_name */
+	cc_none0, /* end_name */
+	cc_none0, /* end_name_list */
+	cc_choose,
+	cc_do_keyx,
+	cc_do_sign
+};
+
+/* see bearssl_ssl.h */
+void
+br_ssl_client_set_single_ec(br_ssl_client_context *cc,
+	const br_x509_certificate *chain, size_t chain_len,
+	const br_ec_private_key *sk, unsigned allowed_usages,
+	unsigned cert_issuer_key_type,
+	const br_ec_impl *iec, br_ecdsa_sign iecdsa)
+{
+	cc->client_auth.single_ec.vtable = &ccert_vtable;
+	cc->client_auth.single_ec.chain = chain;
+	cc->client_auth.single_ec.chain_len = chain_len;
+	cc->client_auth.single_ec.sk = sk;
+	cc->client_auth.single_ec.allowed_usages = allowed_usages;
+	cc->client_auth.single_ec.issuer_key_type = cert_issuer_key_type;
+	cc->client_auth.single_ec.mhash = &cc->eng.mhash;
+	cc->client_auth.single_ec.iec = iec;
+	cc->client_auth.single_ec.iecdsa = iecdsa;
+	cc->client_auth_vtable = &cc->client_auth.single_ec.vtable;
+}